Transmit
Free sandbox email API. Credits that roll over.
Transmit launched on September 8, 2026 with 8 votes, #323 of 5,390 launches that month and more than 90% of that year's launches.
What it does
Most email APIs make you verify a domain before you can really test. Your first “test” is already a send. Transmit starts in a free sandbox: separate keys, simulated email, real webhooks. Sandbox keys never send — like Stripe. No domain to start. When you’re ready: subscribe, verify domain, create a live key. Same API. Real delivery. $20/mo adds 30,000 emails. Unused credits roll over. No tiers. No midnight reset. Build first. Send when you’re ready. transmit.dev
A transactional email API with credits that roll over. $20/month includes 30,000 email credits after sender verification. Unused credits stay yours while you’re subscribed and your account is in good standing.
Quiet month? You still paid for those credits. With Transmit, unused credits roll over. They stay yours while you’re subscribed and your account is in good standing . $20 a month includes 30,000 email credits after sender verification. Need more? $0.50 per thousand emails, with a $10 minimum top-up. A delayed launch. A quieter month. A rush of signups. Your password resets, receipts, and notifications follow your product’s activity. Keep the credits you don’t use for the months you need them. Create your account, name your workspace, and get a test key. Run your integration and exercise your webhooks without a card, a sending domain, or a charge. Sandbox delivery is simulated. When you’re…from transmit.dev
Does a similar job
all alternatives →
Make senders work to get into your inboxJul 2026 · captchainbox.com · ▲44Hi HN :) really excited to share this with you. The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels…
TopMail – LaunchFest Winner, $20/Mo Unlimited Email, Coding Agents APIMar 2026 · topmail.so · ▲12Send email campaigns and transactional emails, set up automations, grow your list, and track revenue. Unlimited emails, unlimited contacts, $20/mo flat. No per-contact charges, no surprises.
More dev tools this month
the category →
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 7d ago · opentrailpaper.com
Vendo ▲362Let your users build their own features inside your product
Dev tools · 25d ago · vendo.run
Source: Product Hunt launch ↗
Launched alongside, September 2026
the whole month →- WI
Special relativity simulator in which light crawls along at a human speed, so Lorentz contraction, aberration and Doppler shift happen at walking pace.
Life & fun · 2d ago · rivendell.dmitrybrant.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 7d ago · opentrailpaper.com
9 major streaming services cost $95.91/mo in 2021-03 and $154.41/mo today — up 61%, or $702 a year. Every change sourced.
Life & fun · 1d ago · honestlyranked.com
- OD